Why does the underside of my valve cover look like this? (pic enclosed)

Posted by 98FWDSM, Jan 13, 2005

Please Support Race Components Inc
  1. 98FWDSM

    98FWDSM Proven Member

    179
    0
    Joined Jul 27, 2003
    ,
    ok, i am replacing the valve cover gasket and when i took my valve cover off this is what the underside looked like....why does it look this way and is it bad???

    Thanks :dsm:
     

    Log in/Register to remove ads

    Attached Files:

    My DSM:
    Loading...
  2. IamCool

    IamCool Proven Member

    145
    0
    Joined Oct 7, 2004
    milwaukee, Wisconsin
    HOLY SH$T! DAMN that looks bad. I took my prelude vtec valve cover off and it look nothing like that.
     
  3. HybridAWD

    HybridAWD Proven Member

    111
    0
    Joined Mar 9, 2003
    ,
    looks like it has seen a lot of heat, i couldnt tell you why that is happening though.
     
  4. 98FWDSM

    98FWDSM Proven Member

    179
    0
    Joined Jul 27, 2003
    ,

    about 4 months ago before i had my radiator replaced i ran it for about 2 or 3 minutes with the temperature gauge at its highest point...i know it was stupid but nonetheless over with now :rolleyes:

    also, she has ALWAYS been very hot under the hood, doesnt overheat but is just very hot, i thought that all DSM's were like this though
     
    My DSM:
    Loading...
  5. Mike1992

    Mike1992 Proven Member

    2,824
    22
    Joined Jul 19, 2003
    Springfield, Missouri
    I think thats normal, my valve cvoer looked like that on the underside when i did the gasket and painted it. I just cleaned it really well and now its spotless.

    Heat-Oil Buildup Crud

    I didnt see the black until now, I dunno wWTF is up with that but I didnt have that.
     
    My DSM:
    1990 Eagle Talon TSi AWD

    11.292 @ 126.120 MPH
    Loading...
  6. HybridAWD

    HybridAWD Proven Member

    111
    0
    Joined Mar 9, 2003
    ,
    yeah i mean i dont think it's a major issue, but running the car at it's hottest point wasnt good either....sh** happens, as long as it's not broke....yet...dont fix it :)
     
  7. Shifty

    Shifty Proven Member

    130
    0
    Joined Dec 2, 2003
    Sioux Falls, South Dakota
    What oil do you use?
     
  8. 98FWDSM

    98FWDSM Proven Member

    179
    0
    Joined Jul 27, 2003
    ,
    i used to use Castrol GTX 10W-30 with a FRAM oil filter, my last 3 oil changes have been Castrol GTX high mileage 10W-30 with a Bosch oil filter....car has 116,000 miles on her
     
    My DSM:
    Loading...
  9. IHeartTurbo

    IHeartTurbo Proven Member

    1,351
    15
    Joined Aug 15, 2003
    Weld, Maine
    I can't tell good from the pic, but it kinda looks like carbon?
     
  10. steve

    steve DSM Wiseman

    12,420
    358
    Joined Feb 3, 2002
    St. Charles, Illinois
    It looks like it's missing the baffle around the PVC area, where all the carbon buildup is.

    Steve
     
    My DSM:
    Loading...
  11. Tongboy

    Tongboy Proven Member

    62
    0
    Joined Dec 13, 2004
    Oregon City,OR/Pullman,Wa, Washington
    yellowing is normal for a car that doesn't have its oil changed damn near constantly

    the black looks like burnt oil or carbon buildup, hard to tell from the pic but it does look pretty expansive, certainly not something that happens from running the car full hot for a few minutes, thats a long term thing there
     
  12. Defiant

    Defiant DSM Wiseman

    25,202
    123
    Joined Jan 13, 2003
    glorious Galt, California
    Yeah, looks like the oil got a bit warm. Nothing terribly drastic.

    You lucked-out with that overheating episode.
     
    My DSM:
    Loading...
  13. XtremeGST

    XtremeGST Proven Member

    135
    0
    Joined Dec 12, 2004
    Bolingbrook, Illinois
    ive ceen this happen before and it was just carbon buildup, we took simple green degreaser and it cleaned it up like nothing. i run 5w-30 synthetic in my car.
     
  14. 98FWDSM

    98FWDSM Proven Member

    179
    0
    Joined Jul 27, 2003
    ,
    what is the best solvent to try to clean it off?? possibly a dumb question but can i just use regular soap or will it mess up something?? also, would changing my type of oil help me any?

    Thanks :dsm:
     
    My DSM:
    Loading...
  15. RamenPride

    RamenPride Proven Member

    2,279
    51
    Joined Aug 18, 2002
    Virginia Beach, Virginia
    i used engine degreaser and hot water first, then I used soft scrub after that.
     
    My DSM:
    Loading...
  16. vtracer20

    vtracer20 Proven Member

    272
    0
    Joined Oct 1, 2004
    Milton, Vermont
    i'll let u know what mine looks like in a next couple weeks once i replace my valve cover (cracks in it leaking oil) also will be replacing the gasket
     
  17. ryanman

    ryanman Proven Member

    294
    2
    Joined Oct 17, 2003
    Kodiak, Alaska
    It's from not changing the oil at regular intervals.
     
  18. DiabloRT

    DiabloRT Proven Member

    216
    0
    Joined Jan 26, 2003
    ,
    The inside of my crankcase on the 97 GST is nice clean alluminum. ....thanks Full SYN like Mobile 1 and Castrol Syn......changed every 2k to 2.5k miles.

    [​IMG]
     
  19. psychlow

    psychlow Proven Member

    2,200
    13
    Joined Jun 30, 2003
    Colorado Springs, Colorado
    ^^^^

    It looks like the oil was used for way too long in that engine. The underside of valve covers are great tools for guaging how well an engine was maintained, along with compression checks and the overall vehicle condition.
     
  20. ProjectTalon130

    ProjectTalon130 Proven Member

    344
    1
    Joined Jul 16, 2003
    G-bury, Connecticut
    I would have to agree with everyone else on this, nothing too crazy to worry about...with how weak our valve covers are to pressure and so forth , I would imagine the thing would crack open before some black buildup on the underside would cause any damage.
     
    My DSM:
    Loading...
  21. Lunch_Box

    Lunch_Box Proven Member

    1,902
    15
    Joined Mar 14, 2003
    Sherwood Park,
    Thats what the underside of my friends valve covered looked like when he over heated his engine to the point of plastic parts starting to melt.
     
  22. ryanman

    ryanman Proven Member

    294
    2
    Joined Oct 17, 2003
    Kodiak, Alaska
    This is actually a good thread, it brings up another good point about buying used cars with aluminum heads, easiest way to check to see if a car has had regular oil changes/been taken care of is to pop off the oil cap and take a look inside the motor and look at the discoloration of the aluminum.
     
  23. Mike1992

    Mike1992 Proven Member

    2,824
    22
    Joined Jul 19, 2003
    Springfield, Missouri
    If thats the case, my car didnt get regular oil changes because when i did my gasket a few months back, the inside of my head was very very brown. Not clean looking. sigh....
     
    My DSM:
    1990 Eagle Talon TSi AWD

    11.292 @ 126.120 MPH
    Loading...
  24. Jeff_Jeske

    Jeff_Jeske Proven Member

    234
    0
    Joined Sep 14, 2004
    Stevens Point, Wisconsin
    That is normal unless you run synthetic oil.

    I am using mobile drive clean....it has detergent but is not synthetic. Slowly but surely it cleans the motor up....or if it was clean it stays clean.

    That cover looks like 95% of the DSMs I have worked on.

    These cars get hot no doubt about it.
     
  25. 95TSiNewbie

    95TSiNewbie Proven Member

    329
    0
    Joined Dec 8, 2003
    Saint Charles / DeKalb, Illinois
    Mine was a little discolored on that side and i was worried so I called a local Mitsu dealership and the mechanic their said that it can happen on the far side of the valve cover because its the furthest point from the oil pump and fresh oil doesnt always travel to the far side of the head. Not sure if thats true but thats what i was told.
     
    My DSM:
    1995 Eagle Talon TSi

      automatic
    Loading...

Share This Page

Loading...


Log in/Register to remove ads

Support Vendors who Support the DSM Community
Ace Race Parts Advanced Fuel Injection Archer Fabrication Boostin Performance ECM Tuning Extreme Turbo Systems ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions Jackson Auto Machine JNZ Tuning Magnus Motorsports Miller Import Parts Morrison Fabrication & Design OHM Racing Race Components Inc RockAuto RoadSurge Spultronix Performance STM Tuned Strictly Import Motorsports VR Speed Factory